Closing birdie for Spieth to share Colonial 1st-round lead

Jordan Spieth watches a tee shot on the 11th hole during the first round of the Colonial golf tournament Thursday, May 21, 2015, in Fort Worth, Texas.

Jordan Spieth watches a tee shot on the 11th hole during the first round of the Colonial golf tournament Thursday, May 21, 2015, in Fort Worth, Texas.

(LM Otero / AP)

STEPHEN HAWKINSAP Sports Writer

FORT WORTH, Texas — Masters champion Jordan Spieth made a 20-foot birdie putt on the final hole with darkness falling Thursday, grabbing a share of the first-round lead in the rain-delayed Colonial.

Spieth just missed the green on his approach at the 18th hole, and putted from off the back right fringe. The closing birdie shortly after 8 p.m. put him atop the leaderboard with Kevin Na, Boo Weekley and Ryo Ishikawa.

After missing the cut at The Players Championship two weeks ago, the 21-year-old Spieth is playing the first of consecutive weeks at home in North Texas.

He had a great chance for a birdie on the par-3 16th, but his 4-foot try slid by the hole.

Play started three hours late Thursday after more than an inch of rain fell overnight at Hogan's Alley.